Fix lazy.nvim parameter name.

`config` expects a function or `true` as a value. `opts` is what you're
looking for when passing in a table of options.

See here for the lazy.nvim plugin specification:
https://github.com/folke/lazy.nvim?tab=readme-ov-file#-plugin-spec

README.md

@@ -18,7 +18,7 @@ Installation with any package manager, Lazy example below:
 return {
     "tris203/precognition.nvim",
     --event = "VeryLazy",
-    config = {
+    opts = {
     -- startVisible = true,
     -- showBlankVirtLine = true,
     -- highlightColor = { link = "Comment" },